报告题目：In-depth Understanding of Battery Interfaces by Nanoscale Chemical Imaging
报 告 人：Prof. Jigang Zhou, Canadian Light Source
报告时间：2017年12月12日（周二）上午 10:00
报告地点：材料楼210会议室
Abstract：
Deeper understanding of the interface (chemical and electronic structure) between components within hybrid active electrode materials and the interface between active electrode materials and the electrolyte is crucial for developing better performance batteries. Element specific X-ray absorption near-edge structures (XANES) spectroscopy, explores detailed information on the local chemistry and electronic states of the absorbing atom which makes it an excellent tool for battery interface investigation to understand chemical bonding, electronic structure, and surface and bulk chemistry difference. XANES with nano-focused X-ray beam (STXM) and surface sensitive field-imaging X-PEEM can collect chemical imaging of high chemical sensitivity and spatial resolution. In this talk I will show nanoscale chemical imaging studies of battery materials by STXM and X-PEEM at CLS SM beamline. The emphasize is novel STXM with yield signal detection (XRF and TEY) and exploratory X-PEEM for surface imaging. Correlative chemical imaging of interface in a commercial like electrode without sample preparation was obtained by X-PEEM. This approach maintains the nature of the interface which is an interplay of local environment, morphology and facet orientation of electrode active materials. That information will lead new insights on battery material surface engineering in and/or out of battery cell toward a battery with high performance and long serve life.
报告人简介：
Jigang Zhou, staff scientist at Canadian Light Source and adjunct professor at Western University and Harbin Institute of Technology (China), received his B.Sc. and M.Sc.in Battery Engineering from Harbin Institute of Technology (HIT) in China and Ph.D. in Chemistry from Western University, Canada. He has ten years on-field battery R&D experience and ten years’ synchrotron energy industrial application experience. His research activities are on developing soft X-ray spectroscopy and spectromicroscopy of on-operando electrochemical cell, combined with various nanomaterials, for their applications for clean energy including Li-ion batteries and fuel cells. Dr. Zhou is an author and co-author of ~ 90 refereed-journals, with total citation of close to 10,000 and H-index of 37.